RU2407967C2 - Roll vacuum-induction drier for producing powder from berries and other vegetable stock - Google Patents

Abstract

FIELD: engines and pumps.

SUBSTANCE: proposed drier comprise tight case with branch pipe to feed pureed product and discharge water vapors, roll, blade, feeder and branch pipe to discharge dry product, and differs in that pureed product feed branch pipe has outlet holes increasing over its length for uniform distribution of the product over the roll inner surface. Note that inductor is arranged in the casing with clearance 8 between the roll surface and inductor for uninterrupted rotation of said roll to radiate industrial-or high-frequency currents for heating the roll outside surface. Note also that IR-heaters are arranged on the panel under the feeder to heat product from inside.

EFFECT: accelerated treatment, higher quality.

4 dwg

Description

The invention relates to techniques for vacuum drying bulk products and can be used in food enterprises and in other processing industries.

The closest in technical essence and the achieved effect is a roller vacuum freeze dryer [ed. No. 21119621, IPC ⁷ F26B 5/06, publ. 09/27/1998], consisting of a sealed enclosure with nozzles for supplying a liquid product and the removal of water vapor, roll, knife, feeder and nozzles for outputting a dry product.

The disadvantages of this dryer are the complexity of cryogenic and vacuum equipment, the duration of the process, the high cost, the need for liquid nitrogen, low productivity and ultimately the high cost of the obtained powders.

An object of the invention is to improve the quality of finished products, the intensification of the process of obtaining powder from berries and other plant materials while reducing processing costs.

The stated technical problem is achieved in that in a roller vacuum induction dryer for producing powder from berries and other plant materials, consisting of a sealed enclosure with a nozzle for supplying a puree product and the removal of water vapor, roll, knife, feeder and nozzles for outputting a dry product, new is that the nozzle for supplying a puree product has outlet openings that increase along the length of the nozzle for a more uniform distribution of the product on the inner surface of the roll, in the housing anovlen inductor with a gap δ between the roll surface and the inductor for the smooth rotation of the roller emitting currents industrial or high-frequency heating roller from the outside, infrared heaters are placed on the panel under heat and dosed product inside.

The invention is illustrated by drawings, where FIG. 1 is a longitudinal section through a roller induction dryer, FIG. 2 is a section A-A of FIG. 1, FIG. 3 is a pipe for supplying a puree product, FIG. 4 is an inductor.

The roller vacuum induction dryer consists of a sealed enclosure 1 (Fig. 1, 2) with a nozzle for supplying a puree-like product 2 (Fig. 3) and for removing water vapor 3, a roll 4 made of a material with low conductivity for Foucault currents, panels with IR emitters 5, a knife 6 for cutting a dried product, an inductor 7 (Fig. 4), consisting of a magnetic circuit 8, an internal transmission surface 9 and an external dielectric surface 10, a feeder with a screw 11 for moving the dried product to the pipe for outputting the dry product 12 and gateway 13 for udale Niya product from a sealed enclosure.

The dryer operates as follows.

Inside the sealed cylindrical body 1 through the pipe 2 is introduced crushed puree berry or other vegetable raw materials. The pipe for supplying the product 2 has outlet openings increasing along the length of the pipe (Fig. 3, where d ₁ <d ₁₄ ) for a more uniform distribution of the product on the inner surface of the dryer roll 4. The product is evenly distributed over the surface with a thin layer. From the outside, the surface of the roll 4 is heated by an inductor 7 (Fig. 4), which consists of a magnetic circuit 8, an internal transmitting surface 9 and a shielding dielectric outer surface 10, which allows directing a stream of electromagnetic waves emitted at an industrial or high frequency onto the roll 4. Under the influence of electromagnetic waves, the roll 4 is heated by Foucault currents and transfers heat to the dried product. From the inside of the rotating roll 4, the product is heated by infrared heaters installed on the panel 5. Moving along the roll, the product dries, is cut with a knife 6 and enters the feeder with the screw 11, which moves the dried product to the branch pipe for the output of dry powder 12. Through the lock 13 dry powder is removed from the sealed enclosure 1.

The proposed roller vacuum induction dryer allows you to speed up the processing of powdered berries and other raw materials while improving the quality of the products and reducing processing costs.

Claims (1)

Roller vacuum induction dryer for producing powder from berries and other plant materials, consisting of a body with a nozzle for supplying a puree product and removal of water vapor, a roll, a knife, a feeder and nozzles for outputting a dry product, characterized in that the nozzle for supplying a puree product has outlet openings increasing along the length of the nozzle for more uniform distribution of the product along the inner surface of the roll; an inductor with a gap δ between the surface of the roll and the inductor I uninterrupted roller rotation emitting currents industrial or high frequency heating roller from the outside, infrared heaters are placed on the panel under the feeder, heating the product from the inside.

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